Free Chromosomes MCQs with Answers
633 Chromosomes MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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633 questions · page 32 of 32
- A. Histone
- B. RNA
- C. DNA
- D. All of the above
Explanation: The material controlling heredity in chromosomes is DNA. DNA carries genetic information and directly influences hereditary traits in…
Correct answer: DNA- A. Down's syndrome
- B. Turner's syndrome
- C. Jacobs syndrome
- D. Klinefilter's syndrome
Explanation: Klinefelter's syndrome is characterized by the presence of an additional X chromosome in males.
Correct answer: Klinefilter's syndrome- A. Prophase
- B. Metaphase
- C. Anaphase
- D. Telophase
Explanation: During the process of cell division, specifically in mitosis or meiosis, condensation of chromosomes occurs.
Correct answer: Metaphase- A. two daughter cells
- B. sister chromatids
- C. mitosis
- D. unregulated growth
Explanation: Cell division Mitosis or meiosis results in the formation of daughter cells from the division of the parent cell.
Correct answer: two daughter cells- A. 43
- B. 1.29
- C. 0.43
- D. 24
Explanation: The total number of chromosomes present in a tobacco plant is 24, therefore option 'D' is correct.
Correct answer: 24- A. 1 nm
- B. 2 nm
- C. 3 nm
- D. 4 nm
Explanation: A histone is a protein that provides structural support to a chromosome.
Correct answer: 2 nm- A. 45
- B. 48
- C. 46
- D. 47
Explanation: The correct number of chromosomes in tobacco is 48. Tobacco is an allopolyploid species, which means it has multiple sets of chromosomes…
Correct answer: 48- A. Genotype
- B. Phenotype
- C. Karyotype
- D. Genome
Explanation: The correct answer is Karyotype. A karyotype is a visual profile of an individual's chromosomes, showing the number and appearance of…
Correct answer: Karyotype- A. Number
- B. Inheritance
- C. Heredity
- D. Composition
Explanation: Genes are specific sequences of nucleotides within DNA that reside on chromosomes.
Correct answer: Number- A. XXY
- B. XY
- C. XYY
- D. XYYY
Explanation: In Down's syndrome, the affected person contains an extra autosomal chromosome number 21 (trisomy 2n+1).
Correct answer: XY- A. Tadpole Larvae
- B. Frog
- C. Trochophere larvae
- D. Salamander larvae
Explanation: When scientists first observed chromosomes in the dividing cells of salamander larvae, they noticed these thread-like structures that…
Correct answer: Salamander larvae- A. Translocation
- B. Linkage
- C. Mutation
- D. Nondisjunction
Explanation: A permanent change in the genetic structure of a gene is called a mutation.
Correct answer: Mutation- A. Metacentric
- B. Sub metacentric
- C. Acrocentric
- D. Telocentric
Explanation: An acrocentric chromosome is a chromosome in which the centromere is located very close to one end, creating a long arm (q) and a short…
Correct answer: Acrocentric